Post-Its are oh-so-convenient, as you might know, and for those of us that find them integral to our work habits, let’s take a moment to appreciate this grid version. I can’t think of all the ways these would come in handy, but I know I would use the heck out of them. Perhaps one could graph a few quadratic functions (as one does, often), sketch out a simple organizational chart, or just make the grocery list neat and tidy.